1 /* 2 * Linux ethernet bridge 3 * 4 * Authors: 5 * Lennert Buytenhek <buytenh@gnu.org> 6 * 7 * $Id: br_private.h,v 1.7 2001/12/24 00:59:55 davem Exp $ 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 */ 14 15 #ifndef _BR_PRIVATE_H 16 #define _BR_PRIVATE_H 17 18 #include <linux/netdevice.h> 19 #include <linux/miscdevice.h> 20 #include <linux/if_bridge.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_PORT_DEBOUNCE (HZ/10) 31 32 typedef struct bridge_id bridge_id; 33 typedef struct mac_addr mac_addr; 34 typedef __u16 port_id; 35 36 struct bridge_id 37 { 38 unsigned char prio[2]; 39 unsigned char addr[6]; 40 }; 41 42 struct mac_addr 43 { 44 unsigned char addr[6]; 45 }; 46 47 struct net_bridge_fdb_entry 48 { 49 struct hlist_node hlist; 50 struct net_bridge_port *dst; 51 52 struct rcu_head rcu; 53 atomic_t use_count; 54 unsigned long ageing_timer; 55 mac_addr addr; 56 unsigned char is_local; 57 unsigned char is_static; 58 }; 59 60 struct net_bridge_port 61 { 62 struct net_bridge *br; 63 struct net_device *dev; 64 struct list_head list; 65 66 /* STP */ 67 u8 priority; 68 u8 state; 69 u16 port_no; 70 unsigned char topology_change_ack; 71 unsigned char config_pending; 72 port_id port_id; 73 port_id designated_port; 74 bridge_id designated_root; 75 bridge_id designated_bridge; 76 u32 path_cost; 77 u32 designated_cost; 78 79 struct timer_list forward_delay_timer; 80 struct timer_list hold_timer; 81 struct timer_list message_age_timer; 82 struct kobject kobj; 83 struct work_struct carrier_check; 84 struct rcu_head rcu; 85 }; 86 87 struct net_bridge 88 { 89 spinlock_t lock; 90 struct list_head port_list; 91 struct net_device *dev; 92 struct net_device_stats statistics; 93 spinlock_t hash_lock; 94 struct hlist_head hash[BR_HASH_SIZE]; 95 struct list_head age_list; 96 97 /* STP */ 98 bridge_id designated_root; 99 bridge_id bridge_id; 100 u32 root_path_cost; 101 unsigned long max_age; 102 unsigned long hello_time; 103 unsigned long forward_delay; 104 unsigned long bridge_max_age; 105 unsigned long ageing_time; 106 unsigned long bridge_hello_time; 107 unsigned long bridge_forward_delay; 108 109 u16 root_port; 110 unsigned char stp_enabled; 111 unsigned char topology_change; 112 unsigned char topology_change_detected; 113 114 struct timer_list hello_timer; 115 struct timer_list tcn_timer; 116 struct timer_list topology_change_timer; 117 struct timer_list gc_timer; 118 struct kobject ifobj; 119 }; 120 121 extern struct notifier_block br_device_notifier; 122 extern const unsigned char bridge_ula[6]; 123 124 /* called under bridge lock */ 125 static inline int br_is_root_bridge(const struct net_bridge *br) 126 { 127 return !memcmp(&br->bridge_id, &br->designated_root, 8); 128 } 129 130 131 /* br_device.c */ 132 extern void br_dev_setup(struct net_device *dev); 133 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 134 135 /* br_fdb.c */ 136 extern void br_fdb_init(void); 137 extern void br_fdb_fini(void); 138 extern void br_fdb_changeaddr(struct net_bridge_port *p, 139 const unsigned char *newaddr); 140 extern void br_fdb_cleanup(unsigned long arg); 141 extern void br_fdb_delete_by_port(struct net_bridge *br, 142 struct net_bridge_port *p); 143 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 144 const unsigned char *addr); 145 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br, 146 unsigned char *addr); 147 extern void br_fdb_put(struct net_bridge_fdb_entry *ent); 148 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 149 unsigned long count, unsigned long off); 150 extern int br_fdb_insert(struct net_bridge *br, 151 struct net_bridge_port *source, 152 const unsigned char *addr); 153 extern void br_fdb_update(struct net_bridge *br, 154 struct net_bridge_port *source, 155 const unsigned char *addr); 156 157 /* br_forward.c */ 158 extern void br_deliver(const struct net_bridge_port *to, 159 struct sk_buff *skb); 160 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 161 extern void br_forward(const struct net_bridge_port *to, 162 struct sk_buff *skb); 163 extern int br_forward_finish(struct sk_buff *skb); 164 extern void br_flood_deliver(struct net_bridge *br, 165 struct sk_buff *skb, 166 int clone); 167 extern void br_flood_forward(struct net_bridge *br, 168 struct sk_buff *skb, 169 int clone); 170 171 /* br_if.c */ 172 extern int br_add_bridge(const char *name); 173 extern int br_del_bridge(const char *name); 174 extern void br_cleanup_bridges(void); 175 extern int br_add_if(struct net_bridge *br, 176 struct net_device *dev); 177 extern int br_del_if(struct net_bridge *br, 178 struct net_device *dev); 179 extern int br_min_mtu(const struct net_bridge *br); 180 extern void br_features_recompute(struct net_bridge *br); 181 182 /* br_input.c */ 183 extern int br_handle_frame_finish(struct sk_buff *skb); 184 extern int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb); 185 186 /* br_ioctl.c */ 187 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 188 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg); 189 190 /* br_netfilter.c */ 191 extern int br_netfilter_init(void); 192 extern void br_netfilter_fini(void); 193 194 /* br_stp.c */ 195 extern void br_log_state(const struct net_bridge_port *p); 196 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 197 u16 port_no); 198 extern void br_init_port(struct net_bridge_port *p); 199 extern void br_become_designated_port(struct net_bridge_port *p); 200 201 /* br_stp_if.c */ 202 extern void br_stp_enable_bridge(struct net_bridge *br); 203 extern void br_stp_disable_bridge(struct net_bridge *br); 204 extern void br_stp_enable_port(struct net_bridge_port *p); 205 extern void br_stp_disable_port(struct net_bridge_port *p); 206 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 207 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 208 extern void br_stp_set_bridge_priority(struct net_bridge *br, 209 u16 newprio); 210 extern void br_stp_set_port_priority(struct net_bridge_port *p, 211 u8 newprio); 212 extern void br_stp_set_path_cost(struct net_bridge_port *p, 213 u32 path_cost); 214 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 215 216 /* br_stp_bpdu.c */ 217 extern int br_stp_handle_bpdu(struct sk_buff *skb); 218 219 /* br_stp_timer.c */ 220 extern void br_stp_timer_init(struct net_bridge *br); 221 extern void br_stp_port_timer_init(struct net_bridge_port *p); 222 extern unsigned long br_timer_value(const struct timer_list *timer); 223 224 /* br.c */ 225 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, 226 unsigned char *addr); 227 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); 228 229 230 #ifdef CONFIG_SYSFS 231 /* br_sysfs_if.c */ 232 extern int br_sysfs_addif(struct net_bridge_port *p); 233 extern void br_sysfs_removeif(struct net_bridge_port *p); 234 extern void br_sysfs_freeif(struct net_bridge_port *p); 235 236 /* br_sysfs_br.c */ 237 extern int br_sysfs_addbr(struct net_device *dev); 238 extern void br_sysfs_delbr(struct net_device *dev); 239 240 #else 241 242 #define br_sysfs_addif(p) (0) 243 #define br_sysfs_removeif(p) do { } while(0) 244 #define br_sysfs_freeif(p) kfree(p) 245 #define br_sysfs_addbr(dev) (0) 246 #define br_sysfs_delbr(dev) do { } while(0) 247 #endif /* CONFIG_SYSFS */ 248 249 #endif 250